<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="">
      </div>
      <!-- 登陆表单区 -->
      <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
        <!-- 用户 -->
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="el-icon-user"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input v-model="loginForm.password" prefix-icon="el-icon-user-solid" type="password"></el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item class="btns">
          <el-button @click="login" type="primary">登录</el-button>
          <el-button @click="resetLoginForm" type="info">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default{
  data(){
    return{
      //数据登陆表单数据绑定对象
      loginForm:{
        username:'admin',
        password:'123456'
      },
      //表单验证规则
      loginFormRules:{
        //验证用户名是否合法
        username:[
          {required:true, message:"请输入用户名", trigger:"blur"},
          {min:2, max:10, message:"长度2-10之间", trigger:"blur"}
        ],
        //验证密码是否合法
        password:[
          {required:true, message:"请输入密码", trigger:"blur"},
          {min:6, max:15, message:"长度6-15之间", trigger:"blur"}
        ]
      }
    }
  },
  methods:{
    //点击重置按钮，重置登录表单
    resetLoginForm(){
      //console.log(this)
      this.$refs.loginFormRef.resetFields();
    },
    login(){
      this.$refs.loginFormRef.validate(async valid=>{
        if(!valid) return;
        const {data:res}=await this.$http.post('login',this.loginForm);
        if(res.meta.status!==200) return this.$message.error('登陆失败！');
        this.$message.success('登陆成功！');
        //将登陆成功之后的token保存在客户端的sessionStorage中
        window.sessionStorage.setItem("token",res.data.token);
        //通过编程式导航跳转到后台主页，路由地址是：/home
        this.$router.push('/home');
      });
    }
  }
};
</script>

<style lang="less" scoped>
.login_container{
  background-color: rgb(64, 71, 71);
  height: 100%;
}
.login_box{
  width:450px;
  height: 300px;
  background-color: rgb(247, 249, 249);
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top:50%;
  transform: translate(-50%,-50%);
  .avatar_box{
    height: 130px;
    width: 130px;
    border: 1px solid rgb(187, 176, 176);
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 20px rgb(154, 141, 141);
    position: absolute;
    left: 50%;
    transform: translate(-50%,-50%);
    background-color: #fff;
    img{
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: rgb(237, 234, 234);
    }
  }
}
.btns{
  display: flex;
  justify-content: flex-end;
}
.login_form{
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
</style>